Type A This back massage devices use a safe far infrared heating therapy technology, to relieve your waist problem from inside out. Wearable and comfortable for use. Power: 12V. Can charging in car and home. Size: 117cm*21cm (46.06in*8.26in) It can help for the people who has below symptoms: Lumbar process, lumbar disc spur Stomach cold Lumbar muscle fatigue Long-term involvement, lumbar injury Why Choose us? Eight Functions - Hot compress. Infrared light penetration, deep warming from the skin surface to muscle tissue, relieve the waist problem from the inside out. - Optional heating zone. Can control to heat waist or back part, or both. - Three modes temperature. 45& 8451;/55& 8451;/65& 8451;, you can choose the suitable degree to relax and relieve the pain. - Vibration & Massage. Built-in 2 insulation vibration machines, double massage to relax pain. - Moxibustion therapy. Can put Artemisia inside, Ay Tsao is heated, enters the subcutaneous tissue through acupuncture points, and the temperature is deep and deep, and the deep layer of heat is applied to the human body. - Removable Manganese steel support: A manganese steel support belt is placed behind the belt to disperse the waist pressure. - Large capacity battery, comes with car charger and AC adapter. Convenient to use in car and home. - Washable. Suggest hand wash, can not soaked. Package Included 1 x Back Belt 1 x Car Charger 1 x Socket Connector(UKplug/US plug optional) 1 x Manual